Supercell storms are among the rarest and most beautiful weather events on Earth. Filming one with the amazing detail of this time-lapse—taken yesterday by the storm-chasing group Basehunters in eastern Wyoming—is a spectacular feat.
A supercell is essentially a rotating thunderstorm. Strong updrafts spin in a spiral, pulling the clouds into a gigantic saucer-like shape. Because they require very specific conditions to form, supercells do not happen very often.